Automatically-movable dam-crest.



H. BUGHLER.

AUTOMATICALLY MOVABLE DAM CREST.

APPLIOATION IILED NOV.5, 1908.

Patented Mar. 9,1909.

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Specification of Letters Patent.

Patented March 9, 1909.

. Application filed November 5, 1908. Serial No. 461,281.

tornaticaliy-Movable Darn-Qrests; and I do hereby declare thefollowingto be afull, clear, and exact description of the invention, artto which it appertains to make and usethe same, reference being had tothe accompanying'drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

My invention relates to automatic-al movable crests for dams, andhydraulic structures and has for its object the provision of means forautomatically moving the crest upon the varying of the level of thedominant pool or up stream level.

iieforring to the drawings in which like parts are similarly designated,Figure l is a section illustrating a movable darn crest. Fig. 2 is asimilar view showing a modification wherein the pivot point or center ofrotation of the crest and its counterweight are common to one another.Fig. 3 is a similar view showing a modification in which thecounterweight is pivoted above the crest. l ig. 4 shows the crestconnected to a counter weighted arm having rolling contact with itssupport. rig. 5 illustrates means out of contact with the water, forsupporting the crest and having a counterweighted arm with a rollingbearing. Fig. 6 is a further 1nodilica t-ion.

in the several figures a designates the up stream portion of the upperlevel or dominant pool and I: the down stream portion or lower level ortail race of the water-way.

The dam or abutment is designated by c and may be of any desired shapeorconstruction as the particular case may requireoor demand.

The crest 1, of any suitable construction, is hinged or pivotallymounted at its lower edge at d in the dam proper, it being sufficientfor the purposes of this invention that the crestbe in hinged orswinging relation to the darn.

Referring now more particularly to Fig. 1, the crest 1 is connected ator near its upper portion or edge to a strut or link 2, which linlc ispivotally connected to a lever ar1n 3 having a segment 4 eccentric toits pivotpoint 5, the pivot point being between the point of the leverarm is above the segment and the link. (Jonnected to the se ment 4 is achain or wire rope 6 from which is suspended a counterweight .7. Theweight has a tendency to hold the parts in the position shown in 1g. 1,but as soon as the level of the dominant pool or up strear portion arises beyond its designed ilfllit t e crest 1 is moved ahout its hingedpoi end (1, moves the link or rod rotate the lever l5 alfulut i. 5thereby raising the weight and s1. iuitaneous increasing 'the lever armof the weight by reason of the eccentricity or increasing distance ofthe segment from the pivot point t Should it become necessary to mountseveral crests in alineinent then the lever arms 3 are rigidly securedto a shaft common to all of the lever arms required for the number ofcrests used. The counterwcights 7 are likewise connected rigidly to oneanotner so that the several alined crests will move in unison.

' in F 2 I have shown a modification in which the counterweight isattached directly to the crest 1, and the pivot d of the crest 1 servesalso as the pivot point of the lever 3 that carries the sector at forthe chain or wire rope 6 on which weight 7 is suspended.

in Fig. 3 I have shown the mechanism for lifting the crest located abovethe water levels. The link 2 in this case extends upward and isconnected to the two-armed lever 3 pivoted at 5 and carrying the sector4. The counterweigl'it 7 is suspended by a chain or rope (5 from the endof lever 3. When the crest moves downward about its hinged end 66 theweight 7 is raised and the lover arm or said weight is graduallyincreased by reason of the eccentricity of the P sector 4.

In Fig. 4 I have shown the Crest- 1, pivoted at d and connected by link2 to a lever arm 8 having cam 4 rolling on a stationary seat 9 below thecrest and connected to the seat by a flexible connection here shown asbeing a wire rope or chain 10 having one end connected at 11 to the seatand the other In Fig. 5 I have shown a structure so1ne what resemblingFig. 3 where the I preferably but not level. The lever arm 8- however,rests on a roller cam 4* said bearing secured on an elevated plate orsupport 9 and carrying necessarily an adjustable counterweight 7 The arm8 is connected by link 2* to the crest 1. The operation of this form issimilar to that shown in Fig. 4.

In Fig. 61 have shown a modification wherethe upper end of the crest 1is connected by a rope or chain 14 connected to one end of a two armedlever 15 pivoted at 16 and at the other end of the lever arm 15 isconnected a rope or chain 17 on which is weight 18. This weight has ageneral a conical shape and is suspended in a well 19 filled with water,so that when the crest-l is moved by reason of the rise of the level ofthe dominant pool, the absolute weight of the counterweight 18 increasesas it lifts out of .the water in the well 19.

I claim:

1. The combination with a dam and a movable crest in hinged relationthereto; of a pivoted, lever arm, a counterweight connected to the armand means to connect the counterweight to said lever arm toautomatically vary the point of application of the load of said weightto the lever arm with respect to the pivot point of said arm.

2. The combination with a dam and a In testimony crest in hin edrelation thereto; of a pivoted two-armed ever, means to connect one endof the lever with the crest, a counterweight suspended from said leverand means to automatically vary the lever arm of said weight withrespect to the pivot oint of the ever during the movement of t e crest.

3. The combination with a dam and a movable crest in'hinged relationthereto; of a pivoted lever arm, a counterweight, means to connect thelatter to the lever arm, and

means to automatically vary the operative ,load of said weight'on thele'ver'arm with respect to the pivot point of the latter.

4. The combination with an abutment or dam and a crest in pivotedrelation thereto;

of a two armedlever connected to the damand whose center of rotationcoincides with that of the crest, a weight suspended from the arm andmeans to automatically increase the leverage of said weight during thedepression of the crest.

that I claim the foregoing as my invention, 1 have signedmy name inpresence of two subscribing witnesses.

ans BUoHLER. Witnesses: I E. SOHNIDER, M. SILVERMANN.

